Hi raja, 

Neet and aiims  are main entrance exams to get a mbbs or bds seat in the colleges

Neet online application forms are filled  from end of November to 31st December in the past years. 

Aiims online application forms are filled  from starting of January to mid of February in the past years. 

And this will most probably remain same for the coming years. So be aware and stay updated.  For more queries  ask us.